Struct FerroPropertyChangedEventArgs 

pub struct FerroPropertyChangedEventArgs<'a> { /* private fields */ }

Provides information for a property change.

The values are borrowed for the duration of the notification; use the typed accessors to copy them out.

Implementations

impl<'a> FerroPropertyChangedEventArgs<'a>

pub fn sender(&self) -> &'a FerroObject

The object that the property changed on.

pub fn property(&self) -> &'static FerroProperty

The property that changed.

pub fn old_value(&self) -> Option<&'a dyn Any>

The old value of the property, untyped. None when only the base value changed.

pub fn new_value(&self) -> &'a dyn Any

The new value of the property, untyped.

pub fn priority(&self) -> BindingPriority

The priority of the binding that produced the value.

pub fn is_effective_value_change(&self) -> bool

Whether the change represents a change to the effective value of the property (as opposed to a change of a lower-priority base value).

pub fn get_old_value<T: Clone + 'static>(&self) -> Option<T>

Gets the old value of the property. Panics if T is not the type of the property.

pub fn get_new_value<T: Clone + 'static>(&self) -> T

Gets the new value of the property. Panics if T is not the type of the property.

pub fn get_old_and_new_value<T: Clone + 'static>(&self) -> (T, T)

Gets the old and new values of the property. Panics if T is not the type of the property or if there is no old value.

pub fn to_owned_args(&self) -> OwnedFerroPropertyChangedEventArgs

The change held by value: the form a handler receives that cannot borrow the values (a handler attached from markup).

Trait Implementations

impl WeakEventArgs for FerroPropertyChangedEventArgs<'static>

type Args<'a> = FerroPropertyChangedEventArgs<'a>